Moisture-vapor-proof pouch



Aug. 21, 1951 Filed Nov. 4, 1946 2 Sheet -heet l Aug. 21, 1951 J, W, HUTT 2,565,026

MOISTURE-VAPOR-PROOF POUCH Filed NOV. 4,'1946 2 Sheets-Sheet 2 Patented Aug. 21, 1951 MOISTURE-VAPOR-PROOF POUCH John William Hutt, Toront Ontario, Canada, as-

signor to Canada Foils Limited, Toronto, On-

tario, Canada Application November 4, 1946, Serial No. 707,674

2 Claims.

This invention relates to moisture-vapor-proof pouches of the type wherein the goods to be retained therein are enclosed and sealed Within a pocket, the mouth of which is preferably enclosed by a foldable flap and which is particularly used in the merchandising of tobacco in `pouch form convenient for use.

The principal object of the invention is to provide a pouch which will enable a smoker to freely manipulate a pipe bowl and finger within the pouch in filling the pipe without undue restriction and without danger of tearing the pouch at the edges and to provide a gusset type of pouch in which the juncture points at the corners will be moisture-proof to prevent the escape of the natural normal moisture of the tobacco.

A further object is to provide a pouch for packaging materials which are desired to be kept from damage from outside moisture conditions and which will enable the free and easy removal of the last particle of the goods from the package.

The principal feature of the invention consists in the novel formation of a sheet of moisturevapor-proof material folded into pouch form having inwardly folded gussets integral therewith arranged between the front and back panels of the pouch and joining said panels in a moisturevapor-proof closure,

In the accompanying drawings Figure 1 is a plan View of a blank sheet of material cut to fold into a gusset-edged pouch.

Figure 2 is a plan view of the blank showing the rst fold applied thereto.

Figure 3 is a plan view illustrating the second `fold applied to the blank.

Figure 4 is a cross section on the line 4--4 of Figure 3.

Figure 5 is a plan view of the blank illustrating the manner of applying a third fold thereto.

Figure 6 is a cross section on the line 6-6 of Figure 5.

'Figure 7 is a plan view illustrating the manner of folding the blank transversely and securing the edges of the overlapping parts of the blank.

Figure 8 is a cross section through the line 8 8 vof Figure 7.

Figure 9 is a cross section through the completed sealed pouch.

Figure 10 is a plan View of a modified form of blank showing one edge thereof folded inward.

Figure l1 is a cross section on the line Il-II fof vFigure 10.

and 11.

Figure 13 is a cross section on the line l3-I3 of Figure 12.

Figure 14 is a longitudinal section of the lower portion of the pouch of Figure 12.V

Figure 15 is an enlarged perspective view showing the formation of the folded gusset edge of the pouch shown in Figure 13.

Figure 16 is a broken plan view of a further modified form of blank.

Figure 17 is a plan view showing the blank of Figure 16 partly folded.

Figure 18 is a side elevational view of a pouch completed from the blank shown in Figures 16 and 17.

Figure 19 is an enlarged perspective View of a corner of the pouch shown in Figure 18.

Figure 20 is a side elevational View of the bottom fold of the pouch shown in Figure 18.

Figure 21 is a cross section through the completed sealed pouch shown in Figure 17.

Numerous forms of heat sealed pouches used in the packaging of tobacco and other commodities have been used to a considerable extent commercially but such packages present an undesirable feature in that the front andback panels are secured together at the edges in direct physical Contact and form a convergent narrow space in which the packaged goods lodge in such a manner that it is dicult to remove all the contents of the package.

It is the principal objective of this invention to overcome this diflculty by providing a bellowslike construction by arranging folding gusset formations along the meeting edges which will be capable of spreading open to permit ready access to the interior of the package along the edges.

In the construction illustrated in Figure l the blank is formed with parallel sides I-I extending approximately two-thirds of the length thereof. An outward step 2 2 is then formed on either side to broaden the width of the blank and this step leads to a third step 3-3 on either side.

'I'he blank is creased longitudinally from endto-end with creases 4 4 spaced inwardly and creases 5-5 and 6-6 extend parallel with the creases 4-4 in alignment respectively with the outer edges I and with the outer edges of the step 2.

A crease line 1 extends parallel with the bottom edge of the blank and in the rst step of forming the pouch the bottom edge 8 is folded upwardly on the crease 1.

The next step in the formation of the pouch is to fold the blanks longitudinally on the lines 4 which extend straight through from end-toend, as illustrated in Figure 3, where the step portions of the blank are both turned inwardly.

The next step, as illustrated in Figure 5, is the turning outwardly of the step portions along the fold lines 5 5. The folds thus formed at each side of the bottom panel of the blank form a zig-zag overiold El as illustrated in the section Figure 6.

The blank is then folded transverselyv at a point approximately one-third of its length from the bottom and in line with the step 3. rlhis fold then creases across the rst step 2 so that the step 2 then overlaps the bottom section folded up against the middle section.

When this fold is completed there are two longitudinal flaps I5 extending beyond the overfolded edges and these are then folded along the crease lines G to fold behind the back of the middle section I l of the pouch blank.

rl'fhese odge iiaps l are sealed either by the use of a suitable cement or by heat-sealing where the material of the pouch permits so that there is continuous adhesion between the naps l and the back of the middle panel ll of the pouch blank.

It will be noted that the tab portion formed between the steps 2 and 3 is bent transversely after being folded inwardly and is formed to secure a corner sealY at the bottom of the pouch.

When the flaps It are secured at the back the longitudinal strips, between the folds and 3, form infolded: gussets i2 extending along either side of the pouch pocket.

'I he mouth of the pouch may be sealed across in any well; known manner and a flap l?,- is then folded down t0 @replete the pouch.

In the form of the invention illustrated in "Figures,1 '3` to 14, the longitudinal fold creases l are the saine. as those described in respect to eigtn'e lv but the step S: is substantially three times the length` of the same step in Figure l and the blank is creased transversely with triple creases t4, l5 and I5.

In Figure l;l the left-hand side of the illustration shows the longitudinal creases in the blank and the right-hand side shows the longitudinal edges Il turned inwardly7 with an elonf gated step la turned back on the strip Il with the outer sealing flap I8 extending outwardly, and the elongated step, i8 overlapping the outward end of the transverse crease lines lil, l5 and i6,

In folding the blank illustrated in Figure 1) the middle transverse crease l5 is folded in a reverse direction tot'hat of the creases Hl and l5, thus. forming an in fold which forms the bottom gusset |97, as illustrated in Figure 14. Otherwise the outer stripV I8 on either side is folded behind the middle section of the` pouch and secured thereto and Side and. bottom gussets are provided.

Another forrnof` construction is illustrated in Figure 16 where the blank is formed at the mic.,- point between the bottom and middle panel with laterally extending tabs 2) which are each formedV with three longitudinal creases 2l, E2 and 23 extending transversely of the blank. This forms the tabs 723` with a centre crease in continuation of the crease 22 forming the centre crease of a gusset and there are two outside aps E4-25, the inward ends of which are cut in'- wardly on a bevel to the inner section of the 4 folds 2| and 23 and the longitudinal edge crease 4.

In folding this blank the centre line 22 is folded opposite to the two outer folds thus raising a rib throughout the length of the two tabs and across the centre portion of the blank.

At the juncture of the centre portion of the blank and the inwardly tapered edges of the tab the tabs are creased with angular creases 2S and the tabs are bent upwardly on these creases as illustrated in Figure l7. The bottom blank panel is turned upwardly t0 coincide with the centre panel and the outer edge strips 2li and 25 of the tabs 2d. then overlap the outer faces of the two coinciding panels and are adhered thereto with the use of a suitable adhesive applied to the portions 2A. and 25 or by heat-sealing if the material of the pouch is provided to be so treated.

When the side tabs 2G are thus bent upwardly and joined to the bottom end and middle panels a gusset is` formed extending across the bottom of the pouch and this is continued up the side walls of the pocket.

It will be understood that by forming the tabs il@ as an integral part of the blank and as a continuation of the gusset formed between the fold lines 2i and 23, when the strips 24 and 25 at the outer edges of the tabs 2B are sealed on the outer walls of the two facing panels there will be completely sealed joints at the bottom between the bottom gusset and both side gussets.

These gussets are adapted to fold inwardly but when .goods are packed in such containers the *gussets bulge outwardly to accommodate the bulk of material placed in the pouch without unduly straining the seams. Then when the flap of the pouch is opened, the user inserts the lingers or part of the hand into the mouth of the pouch and particularly where a pipe is used and the rilling of the pipe takes place within the pouch, the gussets allow the pouch to expand at both side edges and also along the bottom.

Such a construction relieves the tearing or splitting stress which under such circumstances splits the edges of the ordinary pouch open and where the .gusset is provided it will open up to accommodate the lingers and the pipe without impairing the moisture-vapor-proof quality of the package which will be immediately resumed when the pouch is closed and the flap is folded down.

A pouch such as described and constructed in accordance with either of the forms illustrated provides a highly desirable package in which the contents wi11 not deteriorate and it will provide a package of greater utility.

What I claim as my invention is:

l. A moisture-vapor-procf pouch comprising a blank adapted to be folded transversely to form a pouch having front and back panels, said blank having lateral extensions at each side thereof extending the full length of said front panel and stepped to provide a main extension strip continuous acrossV the transverse fold between said front and back panels, and an outward wing strip terminating at the transverse fold line dening the front panel, said blank being folded inwardly along each longitudinal edge to provide a narrow in fold of substantially the width of said main extension strips and having said main extension strips folded in reverse to said infolds to form therewith side gussets, the main extension strips in extending across said transverse fold line defining at each side of the pouch a pocket to block ingress of moisture inwardly along the transverse fold line at the fold of said main extension strips, said pocket having an apex at the fold line formed by meeting of integral main extension strip portions folded face-to-face and said narrow infold with which said main extension strip is integral and reverse folded on and having walls positioned for seal to a next adjacent surface to prevent ingress of moisture in direction away from said apex, said. wing strips being adapted to be adhered to the back of the blank when said blank is folded transversely to secure said gussets and to close the side edges of the pouch.

2. A moisture-vapor-proof pouch comprising a blank adapted to be folded transversely to form a pouch having front and back panels, said blank having lateral extensions at each longitudinal side edge extending the full length of said front panel and stepped to provide a main extension strip continuous across the transverse fold between said front and back panels, and an outward wing strip shorter than said main strip, said transverse fold including folding along three parallel transverse lines to provide a bottom gusset, said wing strip terminating at the fold line defining the front panel, said blank being folded inwardly along each longitudinal edge to provide a narrow infold of substantially the width of said main extensions and having said main extension strips folded in reverse to said infolds to form therewith side gussets, the main extension strips in extending across said transverse fold line dening at each side of the pouch a pocket to block ingress of moisture inwardly along the transverse fold line at the fold of said main extension strips, said pocket having an apex at the fold line formed by meeting of integral main extension strip portions folded faceto-face and said narrow infold with which said main extension strip is integral and reverse folded on and having walls positioned for seal to a next adjacent surface to prevent ingress of moisture in direction away from said apex, said wing strips being adapted to be adhered to the back of the blank when said blank is folded transversely to secure said gussets and to close the side edges of the pouch.

JOHN WILLIAM HUTT.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 2,033,994 Mulligan Mar. 17, 1936 2,220,231 Gilfillan Nov. 5, 1940 2,325,673 Gurwick Aug. 3, 1943 2,460,909 Shaffer Feb. 8, 1949 

